Oval section dental implant

ABSTRACT

This invention concerns a dental implant with an oval section which allows making implants in places which were not able to make it in them before, because its being narrow in one of the directions distal-mesial or lingual-buccal. The design allows a better cosmetic and gingival case when making implant operation in molar place where two implants are putted distal-mesial and in case of lower incisals. The implant provides high primal stability and big space for the attached surfaces and gives a high performance against the chewing forces.

THE PREVIOUS ART STATE

Since the beginning of the modern era of Dental Implants, we depended on the adoption of a section of circular section shape of the implants. This made us abide by the diameter of the implant, while we know that the biggest implants diameter is approx of 6 mm, which doesn't make the shape beautiful, and sometimes it doesn't support the healthy side for the implant gum, because it is small in case of replacement in the molar. We see that a classic implants smallest diameter is approx of 3 mm, which is big for replacement in some lower incisals and especially when the replacement is for an old single lost tooth, which makes the place very narrow in distal and mesial direction.

Also we face a problem when there is narrow alveolar in lingual and buccal direction, and we face the need of narrow strong implant too, after some orthodontic works, where it produces a narrow bone between two apical roots, which have been moved away one from the other by orthodontic.

TECHNICAL DESCRIPTION OF THE INVENTION

This invention, provides the ability of dental implants for areas with small space in one direction, while it has enough space in the other direction. Also it allows putting two implants for replacement for upper or lower molar. Then we put the implant in the place of mesial root, and we put the other one in the place of distal root. This operation gives us almost natural case and more stability and strength especially when we put the implant in the same direction of the replaced roots.

DETAILED EXPLANATION OF THE INVENTION

A. The Design of the Implant:

The implant consists of two parts:

1. Gingival part: It comes in one shape and size regarding all implant sizes in this system of Dental Implants, which gives us comfortable replacement above this part and using less number of instruments by applying apparatus that holds the implant through this part, and according to (FIG. 1/1) it has a conical shape with diameter of 2.5 mm at the beginning of its body and it grows gradually to conic of 1.5° and length of 4 mm, there is a horizontal threaded hole in diameter of 2 mm, goes through the center of conic in 3 mm length, around the hole there is conical surface toward its centre and this conical surface allows to put cover's screw on the implant see (FIG. 1/7) on the surface of the conical there is one circular groove and it is 1 mm away from its upper surface. We can use this groove for stabilizing the implant on its holder by a hook which goes inside this groove, and after entering the implant into its place, we press on the hook by separating the implant off its holder see (FIG. 13).

The dimensions and design of the gingival part, allow us a big space to have different abutment kinds.

2. The implant inserted part (inside the bone): It is an extension to the gingival part, look (FIG. 1/6) it has oval section shape, it has thickness, width and height, and on its sides there are fixing wings, designed to be stabilized on the bone, they are parallel horizontally pointed little bit down, and they repeat step 0.7 mm they are to be put on the 2 sides of the implant in front of each other according to (FIG. 2). While we left the central part in a strong situation with its whole diameter, so it can be able to resist breaking forces despite the small size of its section. This central part allows quick osseointegration because it is in full touch within the bone. Here we cover for the central part small surface by wide stabilizing surfaces wings on both sides and with proper angle, to provide the maximum stabilizing for the implant. By this way every part of the implant has achieved its object and from its position in best available way (FIG. 2). Also, the thickness of the implant in the occlusal section, increase 0.7 mm more than its thickness at its entering point to its bed. At the same time, we point that the width of the implant increases in the occlusal section 0.7 mm more than its width at the point of entering to its bed see (FIGS. 3/1 and 3/2). The width and thickness of the implant at the point of entering into its bed, decrease 0.2 mm less than the dimensions of this bed see (FIGS. 3/3 and 3/4), which allows the implant a comfort primal entering and then a pressing entering and also condensation for the bone when the implant arrives to its place by light hammering on its holder.

The lower surface of the narrow part of the implant, has a nearly spherical shape, allows a non injurious entering against the mucosa of the sinus or the mandibular nerve (FIG. 4).

not to mention that this implant is made of pure titanium, and cured after forming it by double treatment is using Sand Blast and Acid Etching.

Implants Dimensions:

The implants dimensions in this Dental Implants system are (8-10-12-14 and 16 all in mm), and we mean by the length of the implant here is the length of the inserted part only of the implant. It begins from the spherical bottom of the implant to two parallel grooves when the inserted part meets the gum part Look (FIG. 1/6), the gum part has 4 mm length.

The implants thicknesses: It is the thickness of the inserted part of the implant, but from the side of the gum part, here the implant is in its greater thickness.

Available Thicknesses:

-   -   1. Thickness of 1.5 mm and width of 3 mm, we set a surgical         drill diameter 1 mm for it, with a special surgical guide see         (FIG. 5/3).     -   2. Thickness of 2 mm and width of 4.3 mm, we set a surgical         drill diameter 1.5 mm for it, with a special surgical guide see         (FIG. 5/4).

The total of different sizes for the implant in this system are 10 sizes see (FIG. 5).

Setting the Implant Bed:

It is to be set as follows:

-   -   1. We study the direction, depth, thickness and width of the         implant, according to the occlusal situation and the study of         the bony part that is set for implant, by 3D photos.     -   2. We take off the gingival flap using classic method, it is         also possible not to take it off when using the available         scientific methods for that, but in condition of moving away the         surrounding gum while inserting the implant.     -   3. At first, we use a surgical drill with diameter 1.5 mm for an         example, to go inside the bone according to the requested         direction and length, considering that the fixed place by the         guide drill, will be the center of the implant bed. It is         preferred to have a radiographic photo for the implant place,         after putting surgical guide to make sure of perfect work,         knowing that we can make the requested amendment for inserting         direction easily if needed, because the diameter of the guide         drill is thin. The setting operation at this point is divided         into two methods:

A. In case of bone density (D1, D2) we use a special surgical guide for the oval section implant bed, designed that it goes inside the prepared hole, and by entering it, we provide two parallel passages for the surgical drill 1.5 mm diameter to the two sides of the special surgical guide see (FIG. 6). After setting the three parallel passages with surgical drill 1.5 mm diameter, we get the implant bed according to (FIG. 3/4). All we mentioned regarding the surgical drill 1.5 mm, is the same with 1 mm diameter with its surgical guide by following the same technique, look (FIG. 3/3). We notice that the speed of the surgical drill is slow, because this operation is for once and all for the implant bed, we avoid high heat that leads to failure, and we try to gather the bone little pieces in a container filled with physiological liquid because we will use it later. We can only use high speed drilling with spraying physiological liquid, when drilling cortical bone, then we slow down the drilling speed, at that point we don't need to cool it.

B. Considering the bone (D3, D4 and D5) we have special condensation instruments, carrying exact grooves according to the specified lengths (8, 10, 12, 14 and 16 mm) by using it we can set the implant bed in primal condensation method, after setting the first hole, where the primal condenser enters the first hole, (see FIGS. 7/5 and 7/7) and it expands and condenses the bone on both sides. Then the secondary condenser as (FIGS. 7/6 and 7/8) enters and it expands and condenses the bone and set the final implant bed look at (FIG. 7)

Inserting the Implant in its Bed:

After setting the implant place, we get the implant out from its package, by attaching it to its holder, knowing that we have different shapes and lengths for the holders, according to the implant place in the mouth (FIG. 8). After that, we insert the implant in its place, by light hammering on its holder in order to have it inserted according to the requested accuracy and stability.

After inserting the implant in its place, we take off the holder, by pressing on its special hook. Then we come to cover the implants two shoulders, by the gathered bone crumbs when setting the implant bed that's when the implant thickness is 2 mm (in case the implant thickness is 1.5 mm, there will be no shoulders). Then we re-put the flap in its place, and we stitch it, while leaving approx 1 mm of implant gingival part visible. It is necessary to put the cover screw on the implants gingival part.

This way, we have completed the implant operation, and we must wait till the osseointegration is accomplished. Then we do the replacement above it as usually. In case of life sinus operation, through implant bed hole, we use the special invented instrument for this purpose:

-   -   1. Sinus lift instrument used with (2×4.25 mm) implant, see         (FIG. 9/1).     -   2. Sinus lift instrument used with (1.5×3 mm) implant, see (FIG.         9/2).

Replacement above the Implants:

All the implants have the same size regarding the gingival part. its better to insert 1 mm of the gingival part inside the bone and approx 2 mm inside the gum while approx of 1 mm stays visible in the mouth. In this kind of implants, replacement can be done with all kinds of abutments for example (straight abutment) in different lengths see (FIG. 10/1-10/2-10/3), and we refer to Abutment that fixed above gingival part by connected screw as one piece according to (FIG. 10/5). and no need to explain these kinds of abutments. We concentrate on the feature of attaching method between the implant and abutment above it, where it is done by tightening male conic (1.5° slop) to a similar female conic, and tighten these two parts to each other by a screw (2 mm diameter) that provides strong attachment, prevents any edge leaking, which leads to bacterial growth, and chronic gingival inflammation. Also this kind of attachment permits a possibility for fixing the abutment over the implant in any angle within 360°, here we notice the benefit in the angled abutment see (FIG. 11). Also there is another feature, the passage of the screw is 2 mm diameter, which attaches the abutment to the implant, is itself a threadedx hole 2.5 mm diameter, that means if we want to separate the abutment off the implant, it can be done by tightening the special screw (2.5 mm diameter) through the threaded hole, we press the top of the implant, which causes to move the implant away, separated from the abutment with no need for stress see (FIG. 12). 

1- Oval Section dental Implant has a cover and has several Abutment parts above the implant different in designs and it has set of holders and set of instruments for preparing its bed, and it has set of instruments to sinus lift during works of putting it in the mouth and also has a technique to take Abutment off from above. This dental implant contains two parts: A—Gingival part of implant is connected with inserted part in bone, has male conical form with threaded hole in its centre, and it's uni-sized to all implants in this system. B—the inserted part of implant in bone: it has special oval section design, it gives by its special oval section design a solution for many difficult cases which we suffer it in dental implant and we could'nt solve it with classic implant forms. 2- Oval section dental implant as mentioned in claim No. 1 has several lengths like (8,10,12,14 and 16 mm) 3- Oval section dental implant as mentioned in claim No. 1 has several thicknesses like (1.5 and 2 mm). 4- Oval section dental implant as mentioned in claim No. 1 has several widths like (3 and 4.25 mm). 5- Gingival part of oval section dental implant as mentioned in claim No. 1 has a conical male form Using to connect implant Abutment gives many chances to Abutment situation above implant and we specialize here that the male part is the connected with the implant and the female part is connected with Abutment. 6- Oval section dental implant as mentioned in claim No. 1 it has wide contact and stability surface with bone although it has small dimensions and that is through new design must be protected. 7- Oval section dental implant as mentioned in claim No. 1 has Surgical processing technique includes implant bed preparing method is by using the invented surgical guide leads us to three parallel cylinder spaces which are connected with each other forming the implant bed. 8- Oval section dental implant as mentioned in claim No. 1 it's holded from its package to its bed is done by implant holder which holds the implant by entering its hook edge in the circular groove which is exist in gingival part of implant, and we have variable collection of holders and with several lengths according to purposes. 9- Oval section dental implant as mentioned in claim No. 1 has special technique for taking off the Abutment of the implant by making screw's space which is specialist for fixing the implant and which is exist in Abutment is making it threaded and with a diameter bigger than fixing screw's diameter, and making fixing screw passes through it but without stucking to each other. 10- Oval section dental implant as mentioned in claim No. 1 has Abutment taking off screw of implant is a screw with a little bit bigger diameter than fixing screw's diameter, it's compatible with this space screwing this screw causes pressure on the upper part of gingival part of the implant which pushes the Abutment of the implant. 11- Oval section dental implant as mentioned in claim No. 1 has Oval private design section and uni-measurements sinus lift is compatible with used implant sections. 12- Oval section dental implant as mentioned in claim No. 1 has several Abutment and has Abutment ability above implant is done by two ways: a—By connecting male conic of implant with female conic on Abutment by private screw. b—Way of connecting the Abutment with implant by connecting single piece of Abutment supported by screw located on the upper gingival part of implant. 